# Relationship history for MSHA mine 3608606

Current hierarchy: **David  Forcey; Lynn  Forcey → Forcey Coal Inc → Forcey Tipple**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Lynn  Forcey et al → Forcey Tipple; 1981-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Forcey Coal Inc → Forcey Tipple; 1997-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lynn  Forcey et al → Forcey Coal Inc; 1997-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Forcey et al → Forcey Coal Inc; 1997-02-01 to current/open; source msha-controller-operator-history